Show us those paths you tried... Otherwise we have no clue...
Many:
C:\Android_NDK\android-ndk-r16b\toolchains\arm-linux-androideabi-4.9
C:\Android_NDK\android-ndk-r16b\toolchains\arm-linux-androideabi-4.9\prebuilt\windows\bin
C:\Android_NDK\android-ndk-r16b\toolchains\arm-linux-androideabi-4.9\prebuilt\windows\arm-linux-androideabi\bin
C:\Android_NDK\android-ndk-r16b\toolchains\arm-linux-androideabi-4.9\prebuilt\windows\arm-linux-androideabi\lib
C:\Android_NDK\android-ndk-r16b\platforms\android-16\arch-arm\usr\lib
And I tried others based on google search, but nothing... The truth is that I have no idea as well.
Your help is appreciated. Thank you!